One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,12,14)(11,13,15,16)(17,18)(19,25)(20,23)(21,24)(22,27)(26,31)(28,30)(29,32)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19)(18,22)(20,27)(21,26)(23,25)(24,30)(28,29)(31,32)(1,3,5,4)(2,7,8,6)(10,14)(11,15)(10,14)(13,16)(19,26)(21,29)(22,30)(24,32)(25,31)(27,28) involution — undirected(1,4,5,3)(2,7,8,6)(18,23)(22,25)(24,32)(30,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.